Takahashi Sky-90 II - 3.54 inch f/5.6 Apochromatic Fluorite Doublet Refracting Telescope on EM-11 Temma II, Jr. Mount   $10,143.95,  Takahashi TSS9033, Telescopes, Cheapest
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Takahashi Sky-90 II - 3.54 inch f/5.6 Apochromatic Fluorite Doublet Refracting Telescope on EM-11 Temma II, Jr. Mount

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Sale Price: $10,143.95
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Takahashi Telescope SKY90II FL DBLET APO, EM-11 TEMMA-2 JR.Mount TSS9033

Item No. 111-10030
Manuf. No. Takahashi TSS9033

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Special Order Item Please read terms page before placing order

90mm f/5.56 Fluorite APO Refractor yields beautiful, high-contrast views. OTA weighs only 7 lbs., great travel scope. EM-11 Temma II, Jr. is a GoTo Mount that can handle a payload of up to 25 lbs. 10 arc-second or better tracking accuracy. It comes with BT Technologies finder bracket quick release, and includes wooden tripod with Shimano Clamps.

About the Sky-90II f/5.56 Fluorite APO OTA

The latest telescope model from Takahashi is a truly portable design. The 90mm (3-1/2") f/5.56 fluorite doublet apochromatic optical system is of outstanding quality, with a focal length of 504mm. The optical tube assembly is only 13.8" long and weighs 7 pounds; small enough for an airline 'carry-on'.

Not only is this instrument an excellent choice for astronomy, it can be used as a portable high-quality telescope for birding. The oversize focuser has an adapter for 2" and 1-1/4" diagonals, and accepts the FS series photographic adapters.

  • Light Grasp: 165x
  • Resolution: 1.30"
  • Image Circle: 45mmę w/reducer
  • Photo Field: 5.1 degree w/reducer
Features for the EM-11 Temma II, Jr. Mount
  • Drive System: Dual axes, quartz control, driving frequency: 100pps N/S, Star/Sun switching by hand controller
  • Useable Area: All over the world, but with limit for the latitude
  • High Speed Drive: 120X at DC12V, 250X at DC24V
  • Correcting Speed (Manual Operation): RA: 0.1 ~ 1.9x to the sidereal rate by 0.1X increments. Dec: +/- 1.5 ~ 13.5 arc sec/sec by 1.5 arc sec/sec increments
  • Mode Indicator: High speed operation - red light. Normal operation: green light
  • Power Source: DC12V or DC24V
  • Power Consumption: DC12V: 0.3/1.3A (1.7A) sidereal/high speed (start). DC24V: 0.3/1.9A (1.9A)
  • Operational Temperature: -5 ~ +30 degree C
  • Go-To Operation: By a PC or Takahashi hand controller (THC)
  • Go-To Disc: Pegasus 21
  • Accessory: RS232C cable or RJ-11 cable
Takahashi Sky-90 II 3.54" f/5.6 APO Refractor Specifications
  • Optical Design: Apochromatic Fluorite Doublet Refractor
  • Aperture: 3.5" (90mm)
  • Limiting Visual Magnitude: 11.5
  • Focal Ratio: f/5.56
  • Focal Length: 19.8" (504mm)
  • Optical Tube Dimensions: 3.7" X 14.5" (95mm X 370mm)
  • Focuser Design: Rack & Pinion
  • Mount Type: German Equatorial
  • Drive System: Motorized with GoTo Capabilities
  • Weight - OTA: 7 lbs. (3.2 kg.)
  • Weight - Mount: 24.2 lbs. (11 kg.)
  • Counterweights: 1 - 7.7 lb. (3.5 kg.)
  • Optical Coatings: Fully Muli-Coated

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